Safety device for mines



J. A. NOLAN. SAFETY DEVICE FOR MINES. APPLICATION FILED MAY 2, 191a.

Patented Apr. 20, 1920.

Jli'ilf snares ea ner orrior;

JAMES A. NOLAN, OF BOWERSTQN, GEEK), ASSIGNOB- TE; THE MINING O AFETY DEVICE DEVICE IJIZNES.

Specification of Letters Patent. Patented Apr. 20, 1920.

Application filed May 2, 1918. Serial H0. 232,096.

To all whom it may concern:

Be it known that 1 JAMES A. Non m, a citizen of the United States, residing at Bowerston, in the county of Harrison and State of Qhio, have invented new and useful'lmprovements in Safety Devices for Mines, of which the following is a specification.

This invention relates to improvements to that form of safety apparatus illustrated in my United States Patent 1,307,732, dated April 22, 1919, and has for its primary object to provide mechanism whereby the wheels of a car may be effectively gripped so that the car will be held against displacement during the dumping operation.

An object of the invention is to provide mechanism whereby the flanged plate in my patented device can be dispensed with, and the wheels of the car gripped in a manner to prevent any vibration thereof.

With these and other objects in view the invention will be better understood from the following detailed description taken in connection with the accompanying drawing wherein;

Figure 1 is a plan view of. the mechanism showing the elevator dotted for the sake of clearness.

Fig. 2 is a side elevation of a pair of wheels showing the same engaging the stops.

Briefly stated the invention consists of arranging a predetermined number of stops shaped to engage a predetermined portion of the wheels so the car will be held during the dumping operation and connecting mechanism thereto, wherebyv the stops will be thrown into engagement with the wheels of the car at the proper time when a car passes onto the. elevatorv and be released from the wheels when the car is to move from the elevator.

One construction of mechanism to accomplish this result is illustrated in the drawing consisting of a front pair of stops 1 and a rear pair of stops 2 pivoted tothe elevator as illustrated at 3 so as to swing to positions over the rails or to one side of the rails. Each stop is provided with an arcuate depression 4 the wall of which is adapted to engage a predetermined amount of the peripheral surface of a car wheel when the stop is thrown to an operative position as clearly shown in Fig. 2. By this a *rangement it will be seen that when the stops are in an operative position the car will be prevented from leaving the rails on the elevator due to the stops engaging a preermined amount of the peripheral surace of the wheels.

My invention also consists of mechanism of a construction to give the shoes the proper movement to properly engage the wheels. in this particular showing of my invention i provide two sets of mechanism, one for the front pair of stops and the other for the rear' pair of stops of a somewhat similar construction. The mechanism for the front sto )S is identical to that protected in mv l. .1

pares heretofore mentioned, and consists of a shaft 5 mounted in bearings 6 rotatable a well as longitudinal movement. 0. 1

p no end or a crank arm .e shaft has connected thereto arranged to str1ke a PIOJEC- tion 8 when the elaator reaches a predeermined level, so that the stops 1 may be The t 5 is connected to the stops by links 9 e a spring 10 is arranged to normally the stops in an operative position to en- :6 the car wheels. To complete the mechm I provide a pivoted trigger 11 adaptbe moved by a passing car wheel and wn into an inoperative position.

0 1. connected to the rod 5 by a chain 12. The gor is provided for the purpose of giving longitudinal movement to the shaft 5 to dis- -1= gage the crank arm '7 from the projection e 8; when car passes onto the elevator, so move to an that the stops 1 may be free to operative position.

The mechanism for the eludes a shaft 13 which is mounted for romovement, but not longitudinal This shaft is connected to the stops by links 1% operating as set forth in my patent heretofore mentioned. The crank rear stops 2 in- 15 of the shaft 13 terminates in a weight '3 the elevator the parts are in a position as illustrated in l with a result that when a loaded enters upon the elevator the front wheels strike the trigger 11 and re tract the shaft 5 with the result that the arm 7 is disengaged from the projection 8, and the spring 10 rotate the shaft 5 which through the medium of the links 9 forces the stops over the rails in an operative position to engage the wheels of the incoming car. Upon the initial upward movement of the elevator the gravitational action of the weight 16 will rotate the proper direction to cause throw the shoes t an operative in engagement with the wheels of the. car. Thus it will be seen that the shoes now in a position to effectively e1 ge the'wheels as shown in F 2 of the dr rig so that the the links Li to will. be prevented fr m leaving the rails mi /61011. As will be during the dumping opt understood, member 8 is mounted, in practice, in any suitable manner so to be raised by arm '2 to permit raising of the cage with wit-tripping shaft 5.

It is to be understood that the structural embodiment of the invention as whole and its various features as shown is merely illustrative and not restrictive, since I am well aware that many of the details of construction be widely varied without departingfrom the spirit of the invention. 1 therefore do not desire to be limited in these particulars or in any others, except set forth in the appended claims.

daring described my in 'ention, what I claim is:

1. In combination, a cage, front and back pairs of stops carried thereby, independent shafts roclrably mounted on said cage, operating connections between said shafts and. the respective pairs of stops, means for nor- .mally holding said shafts 1n rocked adjustment so as to hold the stops in operative position. means for rocking the shafts so as to .move the stops into inoperative position upon the cage reaching" the limit of its downward travehrand'means actuated by a car entering the cage for releasing the operating shaft for the front stops so as to permit return of the same to operative position, the shaft for the rear stops being released upon raising of shaftlg in the men-t, position. 3

normally holding said 'tractinp; said front shaft. I"

position, means cooperatshaft in such direction as to move the back stops into inoperative position as the cage approaches the limitof itsdownward move a second shaft mounted on the cage for l oth axial and rockingmorement, open connections 1; tie front std oldingi; the secondshai ment so to hold the front stopsin operative position, an arm carried by the second sh ft, a member positioned tobe struck by s. means for normally saidarm as the cage'approaches the limit of its downward movement soas to reel: the

shaftin such direction as to move the front steps into inoperative position, means for second shaft extended, and means actuated by a car entering the cage for retrac mg thesecond shaft so as to move thearm thereof out of contact with said member and permit return of said front stops to operative position. V

3. In combination, a cage, front and back pairs of stops carried thereby," a back shaft roclrahly mounted on the cage, operating connections between said shaft and the back stops, a weighted armextending from said shaft and serving to normally hold said shaft in rookeo adjustment to hold the stops in opera ive position, a front shaft mounted on the'c e for rocking Zll'lClfiI-Zlll movement, operatin connections between said front shaft and the frontstopgmeans for normally holdin the front shaft in rocked adjus ment so as to hold the frontstops in op eratiye position, a trip arm extending from said front shaft, means for normally holding the front shaft extended, and means actuated by a car ntering the cage for re-- In testimony whereof i am my signature.

JAMES A. NOLAN.

nt so as to hold the hack.

a with said holdinq means for roclrin the v (a X, -1

etween said second shaft .v in roclred adjust 

